You must not give airdrop too much time and attention more than you give to other jobs that are more reliable than the airdrops. If you have spare time, you can still farm some few picks which you feel are runs by good altcoins projects. The possibility of participating in an airdrop that will reward you a massive amount is dependent on luck, and if you are not also regular with airdrops, you could miss out from those airdrops that can give such big reward, but still, don't give it all your time because the percentage of good airdrops is very low.